beangle-commons-core
API
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beangle-commons-core/org.beangle.commons/org.beangle.commons.lang/Objects

Objects

org.beangle.commons.lang.Objects
object Objects

Attributes

Graph
Supertypes
class Object
trait Matchable
class Any
Self type
Objects.type

Members list

Type members

Classlikes

class CompareBuilder

Compare Builder

Compare Builder

Attributes

Since

4.2.4

Supertypes
class Object
trait Matchable
class Any
class EqualsBuilder

Equals Builder

Equals Builder

Attributes

Since

3.1.0

Supertypes
class Object
trait Matchable
class Any
class ToStringBuilder(val className: String)

Support class for Objects.toStringBuilder.

Support class for Objects.toStringBuilder.

Attributes

Supertypes
class Object
trait Matchable
class Any

Value members

Concrete methods

def default[T](clazz: Class[T]): T
def defaultIfNull[T](value: T, defaultValue: T): T

Returns a default value if the object passed is null.

Returns a default value if the object passed is null.

defaultIfNull(null, null)      = null
defaultIfNull(null, "")        = ""
defaultIfNull(null, "zz")      = "zz"
defaultIfNull("abc", *)        = "abc"
defaultIfNull(Boolean.TRUE, *) = Boolean.TRUE

Value parameters

<

T> the type of the object

defaultValue

the default value to return, may be null

object

the Object to test, may be null

Attributes

Returns

object if it is not null, defaultValue otherwise

Since

3.0

def equals(a: Any, b: Any): Boolean

Compares two objects for equality, where either one or both objects may be null.

Compares two objects for equality, where either one or both objects may be null.

equals(null, null)                  = true
equals(null, "")                    = false
equals("", null)                    = false
equals("", "")                      = true
equals(Boolean.TRUE, null)          = false
equals(Boolean.TRUE, "true")        = false
equals(Boolean.TRUE, Boolean.TRUE)  = true
equals(Boolean.TRUE, Boolean.FALSE) = false

Value parameters

a

the first object, may be null

b

the second object, may be null

Attributes

Returns

true if the values of both objects are the same

Since

3.0

def equals(a: Array[Any], b: Array[Any]): Boolean

Compares two object array for equality, where either one or both objects may be null. Note: Don't user Any[_],fo after type erase ,it has same signature with equals(a:Any,b:Any)

Compares two object array for equality, where either one or both objects may be null. Note: Don't user Any[_],fo after type erase ,it has same signature with equals(a:Any,b:Any)

Attributes

def getIdentityHexString(obj: AnyRef): String

Return a hex String form of an object's identity hash code.

Return a hex String form of an object's identity hash code.

Value parameters

obj

the object

Attributes

Returns

the object's identity code in hex notation

def toString(obj: AnyRef): String

Gets the toString of an Object returning an empty string ("") if null input.

Gets the toString of an Object returning an empty string ("") if null input.

toString(null)         = ""
toString("")           = ""
toString("bat")        = "bat"
toString(Boolean.TRUE) = "true"

Value parameters

obj

the Object to toString, may be null

Attributes

Returns

the passed in Object's toString, or nullStr if null input

See also

String#valueOf(Object)

Since

3.0

def toStringBuilder(self: AnyRef): ToStringBuilder

Creates an instance of [[ToStringBuilder]].

Creates an instance of [[ToStringBuilder]].

This is helpful for implementing Object#toString(). Specification by example:

 // Returns "ClassName{}"
 Objects.toStringBuilder(this)
     .toString();

 // Returns "ClassName{x=1}"
 Objects.toStringBuilder(this)
     .add("x", 1)
     .toString();

 // Returns "MyObject{x=1}"
 Objects.toStringBuilder("MyObject")
     .add("x", 1)
     .toString();

 // Returns "ClassName{x=1, y=foo}"
 Objects.toStringBuilder(this)
     .add("x", 1)
     .add("y", "foo")
     .toString();
 }}

 // Returns "ClassName{x=1}"
 Objects.toStringBuilder(this)
     .omitNullValues()
     .add("x", 1)
     .add("y", null)
     .toString();

Value parameters

self

the object to generate the string for (typically this), used only for its class name

Attributes

Since

3.1

def toStringBuilder(clazz: Class[_]): ToStringBuilder

Creates an instance of ToStringBuilder in the same manner as toStringBuilder(AnyRef), but using the name of clazz instead of using an instance's Object#getClass().

Creates an instance of ToStringBuilder in the same manner as toStringBuilder(AnyRef), but using the name of clazz instead of using an instance's Object#getClass().

Value parameters

clazz

the Class of the instance

Attributes

def toStringBuilder(className: String): ToStringBuilder

Creates an instance of ToStringBuilder in the same manner as toStringBuilder(AnyRef), but using className instead of using an class instance.

Creates an instance of ToStringBuilder in the same manner as toStringBuilder(AnyRef), but using className instead of using an class instance.

Value parameters

className

the name of the instance type

Attributes

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